The Man Who Knew Infinity Index -

(1887–1920), a self-taught Indian mathematical genius whose work revolutionized the field in the early 20th century. The title is shared by a definitive biography and its popular film adaptation.

In Robert Kanigel’s biography, significant attention is given to Ramanujan's work on pi ($\pi$). The paper Modular Equations and Approximations to $\pi$ is famous because it provided the foundation for the fastest algorithms used by modern computers to calculate the digits of pi. the man who knew infinity index